Just wondering how it is to send large files to the printer of choice?

Being relatively new to digital it is one of the things I would like to know. I have an old HP 895Cse (great photo quality) which takes the large ink cartridges, which are going to be obsolete soon enough. Also I can only print 8 x 10.

If I want to send out for 11 x 14's for my best work, do they expect finished files, do they adjust anything, or do they just print as sent......